indicate model loading failure by nomodel.png

plugins/assmodel/model.cpp

@@ -354,7 +354,7 @@ private:
 			*j++ = i;
 		}
 
-		m_shader = "";
+		m_shader = "nomodel";
 
 		UpdateAABB();
 	}

plugins/md3model/model.h

@@ -548,7 +548,7 @@ inline void Model_constructNull( Model& model ){
 		surface.indices().insert( *i );
 	}
 
-	surface.setShader( "" );
+	surface.setShader( "nomodel" );
 
 	surface.updateAABB();
 

plugins/model/model.cpp

@@ -293,7 +293,7 @@ private:
 			*j++ = *i;
 		}
 
-		m_shader = "";
+		m_shader = "nomodel";
 
 		UpdateAABB();
 	}

plugins/shaders/shaders.cpp

@@ -955,7 +955,10 @@ public:
 		if ( m_pTexture->texture_number == 0 ) {
 			m_notfound = m_pTexture;
 
-			const auto name = StringStream( GlobalRadiant().getAppPath(), "bitmaps/", ( IsDefault() ? "notex.png" : "shadernotex.png" ) );
+			const auto name = StringStream( GlobalRadiant().getAppPath(), "bitmaps/",
+				( string_equal( m_template.getName(), "nomodel" )? "nomodel.png"
+				: IsDefault() ? "notex.png"
+				: "shadernotex.png" ) );
 			m_pTexture = GlobalTexturesCache().capture( LoadImageCallback( 0, loadBitmap ), name );
 		}
 

radiant/nullmodel.cpp

@@ -47,10 +47,10 @@ class NullModel :
 	RenderableWireframeAABB m_aabb_wire;
 public:
 	NullModel() : m_aabb_local( Vector3( 0, 0, 0 ), Vector3( 8, 8, 8 ) ), m_aabb_solid( m_aabb_local ), m_aabb_wire( m_aabb_local ){
-		m_state = GlobalShaderCache().capture( "" );
+		m_state = GlobalShaderCache().capture( "nomodel" );
 	}
 	~NullModel(){
-		GlobalShaderCache().release( "" );
+		GlobalShaderCache().release( "nomodel" );
 	}
 
 	VolumeIntersectionValue intersectVolume( const VolumeTest& volume, const Matrix4& localToWorld ) const override {